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Joining of dissimilar metals between magnesium AZ31B and aluminum A6061-T6 using galvanized steel as a transition joining layer

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Journal of Iron and Steel Research International 2022年第4期29卷 677-686页

作者： Wei Li jing-huan Chang Bao-feng Wen Rui Cao State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metal Lanzhou University of TechnologyLanzhou 730050GansuChina Department of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050GansuChina

A galvanized steel is used to join Mg AZ31B alloy and Al A6061-T6 alloy as a joining transition layer by cold metal transfer(CMT)***,to optimize the process variables,extensive welding tests were performed by a design of experiment ***,microstructures,joining mechanisms and tensile properties were characterized and *** indicated that Mg and Al alloys can be joined by using galvanized steel as a joining transition layer and cold metal transfer welding *** formed joint is called as a Mg–steel–Al CMT *** using galvanized steel transition joining layer,Mg–Al brittle intermetallics Al12Mg17 and Al3Mg2 were *** properties of Mg–steel–Al CMT joints have been improved after optimizing the welding *** strength of Mg–steel–Al CMT joint is comparable to those of Al–Al joint and Mg–Mg *** strength of Mg–steel–Al CMT joint can reach 100%that of Al–Al joint and Al–steel joint,and reach 90%that of Mg–Mg joint and Mg–steel *** optimized Mg–steel–Al CMT welded joint with galvanized steel transition layer is fractured at the heat affected zone of Al base metal rather than at the weld-brazed interface,due to softening of Al base metal.

关键词： Cold metal transfer Mg alloy Al alloy Galvanized steel Transition joining layer Dissimilar metal joining

Reference Image Guided Super-Resolution via Progressive Channel Attention Networks

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Journal of Computer Science & Technology 2020年第3期35卷 551-563页

作者： huan-jing Yue Sheng Shen jing-Yu Yang Hao-Feng Hu Yan-Fang Chen School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China School of Precision Instrument and Opto-Electronics Engineering Tianjin UniversityTianjin 300072China

In recent years,the convolutional neural networks(CNNs)for single image super-resolution(SISR)are becoming more and more complex,and it is more challenging to improve the SISR *** contrast,the reference image guided super-resolution(RefSR)is an effective strategy to boost the SR(super-resolution)*** RefSR,the introduced high-resolution(HR)references can facilitate the high-frequency residual prediction *** to the best of our knowledge,the existing CNN-based RefSR methods treat the features from the references and the low-resolution(LR)input equally by simply concatenating them ***,the HR references and the LR inputs contribute differently to the final SR ***,we propose a progressive channel attention network(PCANet)for *** are two technical contributions in this ***,we propose a novel channel attention module(CAM),which estimates the channel weighting parameter by weightedly averaging the spatial features instead of using global ***,considering that the residual prediction process can be improved when the LR input is enriched with more details,we perform super-resolution progressively,which can take advantage of the reference images in *** quantitative and qualitative evaluations on three benchmark datasets,which represent three typical scenarios for RefSR,demonstrate that our method is superior to the state-of-the-art SISR and RefSR methods in terms of PSNR(Peak Signal-to-Noise Ratio)and SSIM(Structural Similarity).

关键词： reference-based super resolution channel attention progressive channel attention network(PCANet)

Preparation of polythiophene/WO_3 organic-inorganic hybrids and their gas sensing properties for NO_2 detection at low temperature

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Journal of Natural Gas Chemistry 2011年第4期20卷 403-407页

作者： jing huan~ Yanfei Kang Taili Yang Yao Wang Shurong Wang Sinopec Research Institute of Petroleum Engineering Beijing 100101 China＂ Department of Chemistry Nankai University Tianjin 300071 China

Polythiophene/WO3（PTP/WO3）organic-inorganic hybrids were synthesized by an in situ chemical oxidative polymerization method,and char- acterized by X-ray diffraction（XRD）,transmission electron microscopy（TEM）and thermo-gravimetric analysis（TGA）.The Polythiophene/ WO3 hybrids have higher thermal stability than pure polythiophene,which is beneficial to potential application as chemical *** sensing measurements demonstrate that the gas sensor based on the Polythiophene/WO3 hybrids has high response and good selectivity for de- tecting NO2 of ppm level at low *** the operating temperature and PTP contents have an influence on the response of PTP/WO3 hybrids to *** 10 wt%PTP/WO3 hybrid showed the highest response at low operating temperature of *** is expected that the PTP/WO3 hybrids can be potentially used as gas sensor material for detecting the low concentration of NO2 at low temperature.

关键词： polythiophene/WO3 organic-inorganic hybrids gas sensing properties NO2 detection low temperature

Data Bucket-Based Fragment Management for Solid State Drive Storage System

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Journal of Electronic Science and Technology 2020年第4期18卷 330-340页

作者： Wei Jiang Jun-Long Wang Jin-Yu Zhan jing-huan Yu Hai-Bo Hu School of Information and Software Engineering University of Electronic Science and Technology of ChinaChengdu 610054 Computer Science Department City University of Hong KongHong Kong 999077

The current storage mechanism considered little in data’s keeping *** can produce fragments of various sizes among data *** some cases,these fragments may be serious and harm system *** this paper,we manage to modify the current storage *** introduce an extra storage unit called data bucket into the classical data manage ***,we modify the data manage mechanism to improve our *** keeping data according to their visited information,both the number of fragments and the fragment size are greatly *** different data features and storage device conditions,we also improve the solid state drive(SSD)lifetime by keeping data into different *** show that our designs have a positive influence on the SSD storage density and actual service time.

关键词： Data structure erasing time fragment solid state driver(SSD)

Assessment of genetic diversity by simple sequence repeat markers among forty elite varieties in the germplasm for malting barley breeding

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第10期11卷 792-800页

作者： Jun-mei WANG Jian-ming YANG jing-huan ZHU Qiao-jun JIA Yue-zhi TAO Institute of Crop and Nuclear Technology Utilization Zhejiang Academy of Agricultural Sciences Hangzhou 310021 China

The genetic diversity and relationship among 40 elite barley varieties were analyzed based on simple sequence repeat （SSR） genotyping data. The amplified fragments from SSR primers were highly polymorphic in the badey accessions investigated. A total of 85 alleles were detected at 35 SSR loci, and allelic variations existed at 29 SSR loci. The allele number per locus ranged from 1 to 5 with an average of 2.4 alleles per locus detected from the 40 badey accessions. A cluster analysis based on the genetic similarity coefficients was conducted and the 40 varieties were classified into two groups. Seven malting barley varieties from China fell into the same subgroup. It was found that the genetic diversity within the Chinese malting barley varieties was narrower than that in other barley germplasm sources, suggesting the importance and feasibility of introducing elite genotypes from different origins for malting barley breeding in China.

关键词： Barley (Hordeum vu/gare L.) Genetic similarity Simple sequence repeat (SSR) marker Cluster analysis Genetic diversity

Accumulation phenomena in fluvial processes and the corresponding stochastic model

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Journal of Geographical Sciences 2020年第6期30卷 1021-1040页

作者： jing huan ZHONG Deyu ZHANG Hongwu SHI Xufang WANG Yanjun State Key Laboratory of Hydroscience and Engineeing Tsinghua UniversityBeijing 100084.China State Key Laboratory of Plateau Ecology and Agriculture Qinghai UniversityXining 810016China School of Water Resources and Electric Power Qinghai UniversityXining 810016China

Accumulation occurs widely in fluvial *** accounting for the effects of previous water and sediment conditions on accumulation is essential for studying riverbed *** this study,to reveal the physical mechanisms of accumulation,various geometric observations of both the upstream and downstream reaches of dams on several typical fluvial channels were *** changes in water and sediment conditions were defined as external *** that the probability of an external disturbance conforms to a Poisson distribution,and that the response intensity induced by an individual disturbance decays exponentially over time,a mathematical description of the accumulation of internal responses to external disturbances is ***,a corresponding theoretical model for simulating the spatiotemporal readjustments of characteristic river variables is proposed based on stochastic *** proposed models are then applied to investigate spatiotemporal readjustment in the upper and lower reaches of dams following their *** results indicate that temporally,the vertical,lateral,and overall readjustment rates of the reaches are relatively fast in the early period following dam construction but then decrease rapidly over *** riverbed degradation,channel width,and sedimentation continuously increase until a new dynamic equilibrium is *** phenomena reflect the representative accumulation characteristics of fluvial ***,the erosion intensities in downstream reaches decrease nonlinearly along the channel until eventually *** unbalanced spatial distribution of erosion intensity arises from the system response characterized by propagation in space but decay over time,which is characteristic of accumulation phenomena after *** results of the developed model show that the spatiotemporal readjustments of the studied cross-sections and channel reaches can be accurately descr

关键词： aceumulation phenomenon fluvial process accumulated riverbed degradation channel width accu-mulated erosion and sedimentation

Differences in brain-derived neurotrophic factor gene polymorphisms between acute ischemic stroke patients and healthy controls in the Han population of southwest China

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Neural Regeneration Research 2019年第8期14卷 1404-1411页

作者： Jie Zhou Meng-Meng Ma jing-huan Fang Lei Zhao Mu-Ke Zhou Jian Guo Li He Department of Neurology West China Hospital Sichuan University

Single-nucleotide polymorphisms in the brain-derived neurotrophic factor gene may affect the secretion and function of brain-derived neurotrophic factor, thereby affecting the occurrence, severity and prognosis of ischemic stroke. This case-control study included 778 patients (475 males and 303 females, mean age of 64.0 ± 12.6 years) in the acute phase of ischemic stroke and 865 control subjects (438 males and 427 females, mean age of 51.7 ± 14.7 years) from the Department of Neurology, Wes: China Hospital, Sichuan University, China between September 2011 and December 2014. The patients' severities of neurological defici:s in the acute phase were assessed using the National Institutes of Health Stroke Scale immediately after admission to hospital. The ischemic stroke patients were divided into different subtypes according to the Trial of Org 10172 in Acute Stroke Treatment classification. Early prognosis was evaluated using the Modified Rankin Scale when the patients were discharged. Genomic DNA was extracted from peripheral blood of participants. Genotyping of rs7124442 and rs6265 was performed using Kompetitive Allele Specific polymerase chain reaction genotyping technology. Our results demonstrated that patients who carried the C allele of the rs7124442 locus had a lower risk of poor prognosis than the T allele carriers (odds ratio [OR]= 0.67;95% confidence interval [CI]: 0.45-1.00;P = 0.048). The patients with the CC or TC genotype also exhibited lower risk than TT carriers (OR = 0.65;95% CI: 0.42-1.00;P = 0.049). The AA genotype at the rs6265 locus was associated with the occurrence of ischemic stroke in patients with large-artery atherosclerosis (OR = 0.5& 95% CI: 0.37-0.90;P = 0.015). We found that the C allele (CC and TC genotypes) at the rs7124442 locus may be protective for the prognosis of ischemic stroke. The AA genotype at the rs6265 locus is likely a protective factor against the occurrence of ischemic stroke in patients with large-artery atheroscleros

关键词： nerve regeneration ischemic stroke brain-derived neurotrophic factor single-nucleotide polymorphism risk stroke severity prognosis rs6265 rs7124442 neural regeneration

Interleukin-16 in asthma

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Chinese Medical Journal 2006年第12期119卷 1017-1025页

作者： DENG jing-min SHI huan-zhong Institute of Respiratory Diseases First Affiliated Hospital GuangxiMedical University Nanning 530021 China

Bronchial asthma is a chronic inflammatory disease of the airways that is characterized by lymphocyte, eosinophil, and mast cell infiltration of the submucosa along with mucous gland hyperplasia and subepithelial fibrosis. The inflammatory response in asthma is tightly associated with airway hyperresponsiveness （AHR） to antigen-specific and nonspecific stimuli. Central to the process of airway inflammation in asthma is the T lymphocyte. Thus, T-cell recruitment and differentiation are critical elements in the evolution of the asthmatic state. Besides adhesion molecules such as selectins and integrins, chemokines are thought to be involved in the multi-step process of extravasation by the triggering of integrins and chemotactic attraction of cell subsets. The diversity of chemokines that potentially attract different cell populations makes them interesting candidates for the regulation of effector cell recruitment. Indeed, chemokines especially are inducible and up-regulated in inflammatory lesions,

关键词： asthma CD4^+ T cells interleukin-16 pathogenesis

Intensive chromic acid burns and acute chromium poisoning with acute renal failure

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Chinese Medical Journal 2011年第13期124卷 2071-2073页

作者： XIANG Jun SUN Zhen huan jing-ning Department of Burns Ruijin Hospital Shanghai Jiao TongUniversity School of Medicine Shanghai 200025 China

In this case report, we describe our experience of managing a patient with chemical burns caused by hot chromic acid that covered over 60% of the patient＇s body. The patient developed anuria 48 hours after injury. Early excision of burn eschars and hemodialysis were carried out. The patient survived after a series of comprehensive treatments, including allografting and autografting. In patients burned by hot chromic acid, excision of affected skin down to the muscle fascia should be carried out as soon as possible after injury. Dialysis to remove circulating chromium in the first 24 hours after injury is also recommended.

关键词： bums chromium poisoning renal failure